Google has agreed to settle a patent lawsuit brought by Rockstar, a patent company that had earlier acquired a trove of patents from Nortel Networks.

In a filing in a Texas federal court, Rockstar said a binding term sheet had been executed that “settles, in principle, all matters in controversy between the parties” in the patent infringement dispute.

The terms of the settlement were not disclosed. A term sheet is usually an outline of an agreement arrived at ahead of a more detailed legal document.

As part of a rash of lawsuits filed in the U.S. District Court for the Eastern District of Texas, Marshall Division in October last year, Rockstar alleged that seven patents it acquired from Nortel were infringed by Google. The patents, all titled “Associative Search Engine,” refer to an invention used to provide advertisements based on users’ search terms.

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